Dyeing and Finishing Method for Linen Cotton Textile Fabric with High-shrinkage

ABSTRACT

A dyeing and finishing method for linen cotton textile fabric with high-shrinkage is described in the present invention, comprises the steps as below: preprocessing, pickling, dyeing and shaping, which can make the fabric with sufficient shrinkage and provide a qualitative sense of linen cotton. Through the above way, in the dyeing and finishing method for linen cotton textile fabric with high-shrinkage provided by the present invention, washing treatment on the fabric by the preprocessing and the pickling before dyeing makes the colorizing more easy and decreases the color difference and colored spot after dyeing, opening the fiber of the fabric and cooling shrinkage during the dyeing process can obtain the unique product style, with a handle more like the linen cotton effect, and a pellet feeling appeared on the cloth cover and the product fabric more like the woven fabric.

TECHNICAL FIELD

The present invention refers to the field of dyeing and finishing for textile fabric with high-shrinkage, especially refers to a dyeing and finishing method for linen cotton textile fabric with high-shrinkage.

BACKGROUND ART

To date, the process for textile fabric with high-shrinkage is not mature, color difference and colored spot often appear on the fabric surface, so it is necessary to improve the dyeing process.

Additionally, the handle of the present textile fabric with high-shrinkage generally is soft and smooth, but cannot provide the effect of linen cotton nor the pellet feeling appeared on the cloth cover, so it is necessary to be improved.

CONTENTS OF INVENTION

The main technical problem to be solved in the present invention is to provide a dyeing and finishing method for linen cotton textile fabric with high-shrinkage with the qualitative sense of linen cotton and without color difference or colored spot.

To solve the above technical problem, one technical solution adopted by the present invention is to provide a dyeing and finishing method for linen cotton textile fabric with high-shrinkage, which comprises the steps as below:

Preprocessing: putting the fabric into the dye vat for the first heating process, adding 3-5 g/L soda and 2-5 g/L emulsified oil when heating the temperature to 35° C., controlling the bath ratio between 1:8-12 and then continuing the second heating process, and maintaining for 30-50 minutes with the temperature at 100-120° C.;

Pickling: processing the cooling treatment after the preprocessing, at the cooling rate of 2-3° C./min, when cooling the temperature below 50° C., draining the water in dye vat and washing twice and re-injecting the water and adding 1-3 g/L glacial acetic acid, then processing the third heating treatment, washing cloth for 15-30 minutes when heating the temperature to 50° C.;

Dyeing: adding the dyeing solution and the promoter at the room temperature, the promoter including: 1-3 g/L 98% glacial acetic acid, 1-3 g/L emulsified oil, 1.5-5 g/L leveling agent and 1-4 g/L stabilizer, controlling the bath ratio between 1:8-12, and continuing heating at the heating rate of 2-5° C./min, maintaining for 2-5 minutes with the temperature at 85° C., then heating the temperature to 110-120° C. at the heating rate of 1-3° C./min, and maintaining for 10-15 minutes, and heating the temperature to 130-150° C. at the heating rate of 1-5° C./min, and maintaining for 30-40 minutes, after the preservation, cooling the temperature to 80-100° C. at the cooling rate of 1.5-5° C./min, and after cooling the temperature to 50-70° C. at the cooling rate of 3-5° C./min, cooling down speedily to the room temperature to increase the shrinkage of the fabric; then draining the water in dye vat and washing twice with 15-30 minutes for each washing, and re-injecting the water and adding 2-5 g/L flake caustic and 1-3 g/L sodium hydrosulfite, in which the flake caustic added can open the fiber of fabric to form a unique fabric style, and heating to 85-100° C. at the heating rate of 2-5° C./min, postprocessing maintaining for 20-30 minutes to obtaining the fold sense and leveling effect on the fabric and avoiding the color difference and colored spot; cooling down the temperature below 50-70° C. at the rate of 1-3° C./min after the preservation, draining the water in dye vat and washing twice with 15-20 minutes for each washing, and re-injecting the water and adding 0.8-2 g/L 98% glacial acetic acid, heating to 60-80° C. at the rate of 2-5° C./min, and maintaining for 20-30 minutes, whether the fold sense of fabric is sufficient is decided by the time of the preservation; cooling down the temperature below 50-60° C. at the rate of 3-5° C./min after the preservation, draining the water in dye vat and washing twice with 15-30 minutes for each washing, and re-injecting the water and adding 0.3-1 g/L 98% glacial acetic acid, running for 10-15 minutes and taking out of the dye vat carrying water;

Shaping: setting the shaping temperature at 170-190° C., which is higher than that of the ordinary fabric to make the fabric's shrinkage more adequately, and adding 0.3-1% hydrophilic softener, then putting the fabric into the shaping oven through the padder.

In a preferred embodiment of the present invention, in said shaping step, the rate of the padder is 21-25 m/min.

In a preferred embodiment of the present invention, the dosage of dye of the dyeing solution used in said dyeing step is determined according to the color.

In a preferred embodiment of the present invention, the cooling water with ice is used to cool the dye vat with an accelerated rate to the room temperature during the process of cooling down speedily to the room temperature, in order to increase the fabric's shrinkage.

The beneficial effects of the present invention are as follows: in the dyeing and finishing method for linen cotton textile fabric with high-shrinkage provided by the present invention, the washing treatment on the fabric by the preprocessing and the pickling before dyeing makes the colorizing more easy and decreases the color difference and colored spot after dyeing, opening the fiber of the fabric and cooling shrinkage during the dyeing process can obtain the unique product style, with a handle more like the linen cotton effect, and a pellet feeling appeared on the cloth cover and the product fabric more like the woven fabric.

DESCRIPTION OF EMBODIMENTS

The technical solution of the embodiments of the present invention will be clearly and completely described. Obviously, the embodiments described herein are some embodiments of the present invention, but not all embodiments. Any other embodiments educed by those skilled in the art based on the embodiments described herein without any creative activities should fall into the protection scope of this invention.

The embodiments of the present invention comprise:

Embodiment 1

A dyeing and finishing method for linen cotton textile fabric with high-shrinkage, comprises the steps as below:

Preprocessing: putting the fabric into the dye vat for the first heating process, adding 4 g/L soda and 3 g/L emulsified oil when heating the temperature to 35° C., controlling the bath ratio to 1:8 and then continuing the second heating process, and maintaining for 30 minutes with the temperature at 100° C.;

Pickling: processing the cooling treatment after the preprocessing, with the cooling rate at 2° C./min, when cooling the temperature to 45° C., draining the water in dye vat and washing twice and re-injecting the water and adding 2 g/L glacial acetic acid, then processing the third heating treatment, washing cloth for 15 minutes when heating the temperature to 50° C.;

Dyeing: adding the dyeing solution whose dosage is determined according to the color and the promoter at the room temperature, the promoter including: 2 g/L 98% glacial acetic acid, 1 g/L emulsified oil, 3 g/L leveling agent and 2 g/L stabilizer, controlling the bath ratio between 1:10, and continuing heating at the heating rate of 3° C./min, maintaining for 4 minutes with the temperature at 85° C., then heating the temperature to 116° C. at the heating rate of 2° C./min, and maintaining for 10 minutes, and heating the temperature to 140° C. at the heating rate of 2° C./min, and maintaining for 30 minutes, after the preservation, cooling the temperature to 80° C. at the cooling rate of 3° C./min, after cooling the temperature to 60° C. at the cooling rate of 3° C./min, cooling down speedily to the room temperature to increase the shrinkage of the fabric (the cooling water with ice is used to cool the dye vat with an accelerated rate to the room temperature during the process of cooling down speedily to the room temperature, in order to increase the fabric's shrinkage); then draining the water in dye vat and washing twice with 18 minutes for each washing, and re-injecting the water and adding 3 g/L flake caustic and 2 g/L sodium hydrosulfite, in which the flake caustic added can open the fiber of fabric to form a unique fabric style, and heating to 85° C. with the heating rate of 3° C./min, postprocessing maintaining for 20 minutes to obtaining the fold sense and leveling effect on the fabric and avoiding the color difference and colored spot; after the preservation, cooling down the temperature below 55° C. at the rate of 2° C./min, draining the water in dye vat and washing twice with 15 minutes for each washing, and re-injecting the water and adding 1 g/L 98% glacial acetic acid, heating to 65° C. at the rate of 3° C./min, and maintaining for 20 minutes, whether the fold sense of fabric is sufficient is decided by the time of the preservation; after the preservation, cooling down the temperature below 50° C. at the rate of 3° C./min, draining the water in dye vat and washing twice with 20 minutes for each washing, and re-injecting the water and adding 0.5 g/L 98% glacial acetic acid, running for 10 minutes and taking out of the dye vat carrying water;

Shaping: setting the shaping temperature at 170° C., which is higher than that of the ordinary fabric to make the fabric's shrinkage more adequately, and adding 0.5% hydrophilic softener, then putting the fabric into the shaping oven through the padder at the rate of 22 m/min of the padder.

Embodiment 2

A dyeing and finishing method for linen cotton textile fabric with high-shrinkage, comprises the steps as below:

Preprocessing: putting the fabric into the dye vat for the first heating process, adding 5 g/L soda and 4 g/L emulsified oil when heating the temperature to 35° C., controlling the bath ratio to 1:12 and then continuing the second heating process, and maintaining for 50 minutes with the temperature at 120° C.;

Pickling: processing the cooling treatment after the preprocessing, with the cooling rate at 3° C./min, when cooling the temperature to 46° C., draining the water in dye vat and washing twice and re-injecting the water and adding 3 g/L glacial acetic acid, then processing the third heating treatment, washing cloth for 30 minutes when heating the temperature to 50° C.;

Dyeing: adding the dyeing solution whose dosage is determined according to the color and the promoter at the room temperature, the promoter including: 3 g/L 98% glacial acetic acid, 3 g/L emulsified oil, 5 g/L leveling agent and 4 g/L stabilizer, controlling the bath ratio between 1:12, and continuing heating at the heating rate of 5° C./min, maintaining for 5 minutes with the temperature at 85° C., then heating the temperature to 120° C. at the heating rate of 3° C./min, and maintaining for 15 minutes, and heating the temperature to 150° C. at the heating rate of 5° C./min, and maintaining for 40 minutes, after the preservation, cooling the temperature to 100° C. at the cooling rate of 4° C./min, after cooling the temperature to 70° C. at the cooling rate of 5° C./min, cooling down to the room temperature with the maximum speed to increase the shrinkage of the fabric with maximum limit; then draining the water in dye vat and washing twice with 30 minutes for each washing, and re-injecting the water and adding 5 g/L flake caustic and 3 g/L sodium hydrosulfite, in which the flake caustic added can open the fiber of fabric to form a unique fabric style, and heating to 100° C. with the heating rate of 5° C./min, postprocessing maintaining for 30 minutes to obtaining the fold sense and leveling effect on the fabric and avoiding the color difference and colored spot; after the preservation, cooling down the temperature below 70° C. at the rate of 3° C./min, draining the water in dye vat and washing twice with 20 minutes for each washing, and re-injecting the water and adding 2 g/L 98% glacial acetic acid, heating to 80° C. at the rate of 5° C./min, and maintaining for 30 minutes, whether the fold sense of fabric is sufficient is decided by the time of the preservation; after the preservation, cooling down the temperature below 60° C. at the rate of 5° C./min, draining the water in dye vat and washing twice with 30 minutes for each washing, and re-injecting the water and adding 1 g/L 98% glacial acetic acid, running for 15 minutes and taking out of the dye vat carrying water;

Shaping: setting the shaping temperature at 190° C., which is higher than that of the ordinary fabric to make the fabric's shrinkage more adequately, and adding 1% hydrophilic softener, then putting the fabric into the shaping oven through the padder at the rate of 25 m/min of the padder.

Above all, in the dyeing and finishing method for linen cotton textile fabric with high-shrinkage provided by the present invention, using the flake caustic to open the fiber of the fabric can obtain the unique fabric style, with a high shrinkage of the fabric and a pellet feeling appeared on the cloth cover, thus achieving the linen cotton effect and much more like the woven fabric and a better novelty.

It should be noticed that above embodiments are only examples of the present invention, but not limitations of patent scope of this invention. All other modifications and variations made according to the description of the present invention, or applications used in other relevant technical fields directly or indirectly, should be considered as falling within the patent protection scope of this invention. 

What is claimed is:
 1. A dyeing and finishing method for linen cotton textile fabric with high-shrinkage, which comprises the steps as below: Preprocessing: putting the fabric into the dye vat for the first heating process, adding 3-5 g/L soda and 2-5 g/L emulsified oil when heating the temperature to 35° C., controlling the bath ratio between 1:8-12 and then continuing the second heating process, and maintaining for 30-50 minutes with the temperature at 100-120° C.; Pickling: processing the cooling treatment after the preprocessing, at the cooling rate of 2-3° C./min, when cooling the temperature below 50° C., draining the water in dye vat and washing twice and re-injecting the water and adding 1-3 g/L glacial acetic acid, then processing the third heating treatment, washing cloth for 15-30 minutes when heating the temperature to 50° C.; Dyeing: adding the dyeing solution and the promoter at the room temperature, the promoter including: 1-3 g/L 98% glacial acetic acid, 1-3 g/L emulsified oil, 1.5-5 g/L leveling agent and 1-4 g/L stabilizer, controlling the bath ratio between 1:8-12, and continuing heating at the heating rate of 2-5° C./min, maintaining for 2-5 minutes with the temperature at 85° C., then heating the temperature to 110-120° C. at the heating rate of 1-3° C./min, and maintaining for 10-15 minutes, and heating the temperature to 130-150° C. at the heating rate of 1-5° C./min, and maintaining for 30-40 minutes, after the preservation, cooling the temperature to 80-100° C. at the cooling rate of 1.5-5° C./min, and after cooling the temperature to 50-70° C. at the cooling rate of 3-5° C./min, cooling down speedily to the room temperature to increase the shrinkage of the fabric; then draining the water in dye vat and washing twice with 15-30 minutes for each washing, and re-injecting the water and adding 2-5 g/L flake caustic and 1-3 g/L sodium hydrosulfite, in which the flake caustic added can open the fiber of fabric to form a unique fabric style, and heating to 85-100° C. with the heating rate of 2-5° C./min, postprocessing maintaining for 20-30 minutes to obtaining the fold sense and leveling effect on the fabric and avoiding the color difference and colored spot; cooling down the temperature below 50-70° C. at the rate of 1-3° C./min after the preservation, draining the water in dye vat and washing twice with 15-20 minutes for each washing, and re-injecting the water and adding 0.8-2 g/L 98% glacial acetic acid, heating to 60-80° C. at the rate of 2-5° C./min, and maintaining for 20-30 minutes, whether the fold sense of fabric is sufficient is decided by the time of the preservation; cooling down the temperature below 50-60° C. at the rate of 3-5° C./min after the preservation, draining the water in dye vat and washing twice with 15-30 minutes for each washing, and re-injecting the water and adding 0.3-1 g/L 98% glacial acetic acid, running for 10-15 minutes and taking out of the dye vat carrying water; Shaping: setting the shaping temperature at 170-190° C., which is higher than that of the ordinary fabric to make the fabric's shrinkage more adequately, and adding 0.3-1% hydrophilic softener, then putting the fabric into the shaping oven through the padder.
 2. The dyeing and finishing method for linen cotton textile fabric with high-shrinkage according to claim 1, characterized that in said shaping step, the rate of the padder is 21-25 m/min.
 3. The dyeing and finishing method for linen cotton textile fabric with high-shrinkage according to claim 1, characterized that the dosage of dye of the dyeing solution used in said dyeing step is determined according to the color.
 4. The dyeing and finishing method for linen cotton textile fabric with high-shrinkage according to claim 1, characterized that the cooling water with ice is used to cool the dye vat with an accelerated rate to the room temperature during the process of cooling down speedily to the room temperature, in order to increase the fabric's shrinkage. 